r8169: enable WAKE_PHY as only WoL source when runtime-suspending

We go to runtime-suspend few secs after cable removal. As cable is
removed "physical link up" is the only meaningful WoL source.

Signed-off-by: Heiner Kallweit <hkallweit1@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

drivers/net/ethernet/realtek/r8169_main.c

@@ -4884,7 +4884,7 @@ static int rtl8169_runtime_suspend(struct device *device)
 		return 0;
 
 	rtl_lock_work(tp);
-	__rtl8169_set_wol(tp, WAKE_ANY);
+	__rtl8169_set_wol(tp, WAKE_PHY);
 	rtl_unlock_work(tp);
 
 	rtl8169_net_suspend(tp);